Location of thumbnail image

I have some jpg images which I edited and saved but inadvertantly saved over the originals.
Opening the image file gives the edited image.
The preview shows the edited image.
But the thumbnail still shows the original.

How can I retrieve the original from the thumbnail image? Where are the individual thumbnail image files located? I assume they are in Thumbs.db, but is there a way to get the individual images out of this file?

janetb, Welcome to HTG. I am afraid you can not retrieve the original images as it is since thumbnails are reduced-sized images of the originals used for organizing and recognizing them like in thumbnail view of Windows explorer or picture viewer programs.